MTG Salvation

I second Lord of Tresserhorn, as you could then play the vertical cycle of Flailing Soldier, Flailing Ogre, and Flailing Manticore. He'll also flat-out lose you fewer games for casting him than a Dralnu without counterspell support will.

There are Hunted Dragon, Hunted Troll, and Hunted Phantasm, all of which I would consider bad cards in commander without a way to exploit the tokens. (but maybe not awful awful)

Cosmic Larva,
Drooling Ogre,
Goldnight Castigator
Jagged Poppet,
Mardu Blazebringer,
and Qal Sisma Behemoth are some good reasons to run red.

Ogres are apparently rife with badness as well. Raving Oni-Slave also exists.

Also Worldgorger Dragon and Soulgorger Orgg are really bad.